loading config file from default package vs from classpath

Question

I'm getting a crazy error while loading a config file in a JAX-RS application on jetty.

public class Configuration {
    public static final Properties config = new Properties();

    static {
        config.clear();

        try (InputStream inputStream = Configuration.class.getClassLoader().getResourceAsStream("config.properties")) {
            config.load(inputStream);
        } catch (Exception ex) {
            Logger.error(ex);
        }
    }
}

If I put config.properties in default package, it is working fine. But when I load it with java -cp config.properties there is nothing in config object. I have examined these ways but it doesn't work.

ClassLoader.getSystemClassLoader().getResourceAsStream("config.properties");
ClassLoader.getSystemClassLoader().getResourceAsStream("/config.properties");
Configuration.class.getClassLoader().getResourceAsStream("config.properties");
Configuration.class.getClassLoader().getResourceAsStream("/config.properties");

The strange thing is that I use Tinylog as Logger in project and TinyLog loads its configuration file which is tinylog.properties in the same way:

/* I found this from Tinylog source code */
Configurator.class.getClassLoader().getResourceAsStream("tinylog.properties");

I'm feeding tinylog configuration via java -cp tinylog.properties. Is there anything wrong with my code?

Answer 1

The -cp option takes a list of directories and jar files. It doesn't take properties files. You need to put the directory containing the config.properties file in the classpath.